在EXE和DLL中，FindResource的区别

在EXE和DLL中，FindResource的区别

以下的代码在EXE中，执行无误。可是在DLL中FindResource返回的值就为0了，我用::GetLastError()，得出的值是1813，也就是取不到资源，这是为什么？

BOOL ExtractFile(char *szZlibFile,DWORD    dwRID)
{
    HANDLE    hFile = NULL ;
    HRSRC    hRsrc = NULL ;
    HGLOBAL hGlobal = NULL ;

    DWORD    dwResSize = 0, dwBytesWrite = 0, dwBytesRead = 0;
    PVOID    pRsrc = NULL, pConfigEncrypt = NULL;
    hRsrc = FindResource( NULL, MAKEINTRESOURCE(dwRID), "ZLIB");
    if(hRsrc == NULL)
    {
        MyDbgPrint("[ExtractFile] Locate Resource Error: %d\n", GetLastError());
        return FALSE;
    }

    dwResSize = SizeofResource(NULL, hRsrc);

    hGlobal = LoadResource(NULL, hRsrc);
    if(hGlobal == NULL)
    {
        MyDbgPrint("[ExtractFile] Load Resource Error: %d\n", GetLastError());
        return FALSE;
    }

    pRsrc = LockResource(hGlobal);

    hFile = CreateFile( szZlibFile , GENERIC_ALL, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    if(hFile == INVALID_HANDLE_VALUE)
    {
        MyDbgPrint("[ExtractFile] Create %s File Error: %d\n", szZlibFile , GetLastError());
        return FALSE;
    }

    if( WriteFile( hFile, pRsrc, dwResSize, &dwBytesWrite, NULL) == FALSE)
    {
        MyDbgPrint("[ExtractFile] Write %s File Error: %d\n", szZlibFile , GetLastError());
        return FALSE;
    }
    CloseHandle(hFile);
    MyDbgPrint("[ExtractFile] Write %s File Success\n",szZlibFile);
    return TRUE;

} 

问题出在FindResource的第一个参数取得的HINSTANCE句柄是EXE的HINSTANCE句柄，自然在其中也找不到在DLL中引入的ZLIB这个位图ID了.同时SizeofResource,LoadResource中的第一个参数也应该是DLL的句柄.

解决方法如下:

BOOL ExtractFile(char *szZlibFile,DWORD    dwRID)

{

    HANDLE    hFile = NULL ;

    HRSRC    hRsrc = NULL ;

    HGLOBAL hGlobal = NULL ;

    DWORD    dwResSize = 0, dwBytesWrite = 0, dwBytesRead = 0;

    PVOID    pRsrc = NULL, pConfigEncrypt = NULL;

    HINSTANCE hInst = GetModuleHandle( dll的路径 );

    hRsrc = FindResource( hInst , MAKEINTRESOURCE(dwRID), (LPCTSTR)"ZLIB");

    if(hRsrc == NULL)

    {

        return FALSE;

    }

    dwResSize = SizeofResource( hInst , hRsrc);

    hGlobal = LoadResource( hInst , hRsrc);

    if(hGlobal == NULL)

    {

        return FALSE;

    }

    pRsrc = LockResource(hGlobal);

    hFile = CreateFile( szZlibFile , GENERIC_ALL, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);

    if(hFile == INVALID_HANDLE_VALUE)

    {

        return FALSE;

    }

    if( WriteFile( hFile, pRsrc, dwResSize, &dwBytesWrite, NULL) == FALSE)

    {

        return FALSE;

    }

    CloseHandle(hFile);

    return TRUE;

}